I don't know the correct torque to clamp it up to, you just get a good feel for it after a while. Needless to say there can't be any play in the spindle, and vice versa it can't be too tight. The most important thing is to get everything clean before you fit the bearings, and make sure they're fitted correctly.

angel-tech wrote:I don't know the correct torque to clamp it up to, you just get a good feel for it after a while. Needless to say there can't be any play in the spindle, and vice versa it can't be too tight. The most important thing is to get everything clean before you fit the bearings, and make sure they're fitted correctly.

yep i made sure everything was spotless and they are fitted the correct way round.

its just trying to get the tab nut sorted, like i say ive only done it up a little and the spindle moved up and down by hand. so ill tighten a bit more tonight and see how it goes.

id tighten the tab nut so there was no play then gently tap the spindle with a hammer and play would appear. so I kept tightening until I tapped the spindle with a hammer and no play appeared. now the spindle feels smooth and silent

i did do that last night, the machine is pretty much back together now and ive ran the spindle and its sounds pretty good.

when i got the bearings i made sure they came with specs so i knew exactly what i was buying, i wanted to future proof them for a possible spindle upgrade. the bearings are rated at 19k rpm with grease lubrication or 26k rpm with oil lubrication. the bearing place were saying being open bearings as soon as they get warm/hot lubrication starts to run out.